Norman burdick



N BURICK.

Cupola Furnace. No. 78,924. l, Patented )une 18, 1888.

@with gmt@ @that @Hire NORMAN BURDIOK, OF ALBANY, NEW YORK, ASSIGNOR TO HI-MSELF, JACOB H. SHEAR, ANDV JOSEPH'PAGKABD, OF SAME PLAGE.

Letters .Patent No. 78,924, dated June 16, 1868.

IMPROVEMENT 'IN GUPLA-FURNAGES.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, NORMAN BURDICK, of thecity and county of Albany, and State of New York, have invented a new and useful AImprovement in Cupolas for hZIeltingFurnacesg and that 'the following is a full and exact'description thereof, reference being had to the accompanying drawings, and to the letters marked thcr'eon, and making a part of this specification. l

My said improvement consists in au improved bottom to said cupola, and in its peculiar construction and arrangement, with reference to the discharging and confining the products or refuse coal, cinders, Ste., left in the bottom of the cupola, after the melted iron has been drawn therefrom, so as to -Vcompel the smokeyheated air, and noxious gases to escape through'the cupola into the outer air, instead of'escaping into the building, to the great annoyance, and hindrance of workmen; and my said improvement has reference, also, to the protection and preservation of the bottom of the cupola from the injurious and destructive elects of allowing the heated mass or residuum of' a blast to remain in contact with the bottom, after discharging the same into the pit beneath. l

In theaccompanying drawing- Figure 1 represents a vertical section of a cupola, with4 my improvement attached, in which B B represent the louter shell of the cupola; S S represent the lining tire-brick.; F F, the base of the shell B B.

l? B represent the sections of my improved bottom, and A A represent an inlaid sheet of're-clay, firebrick, or any other non-fusible substance, for the protection of the bottom, B B, from the eticct of melted iron, which sometimes finds its way through the sand in the bottom of the chamber of the cupola, upon the iron bottom. a a a a represent the truck-wheels, attached to the bottom, B B, by which the same is made to move backward and forward upon the rail or guide R R. b brepresent a cam-lever, by means of which the bottom,

B B, is made to t tightto the bottom of the shell and ire-brick ofthe cupola. P P is the pit, into which' the refuse or rcsiduum ofthe blast is discharged, by withdrawing the bottom, B B. E E represent the axle or Wheels, by means of' which, and a chain connecting each .with said axle or wheels, the section of the bottom is withdrawn, and the chamber ofthe cupola is emptied bf its contents.

Figure 2, in the accompanying drawing, represents a vertical .view of the improved bottom and its arrangements, presenting a horizontal section of the cupola at or near its base. VIn this figure one section of the bottom, B B, isi'epresented as withdrawn; the other` section is ,represented in its place, partially concealed by the base of theshell F F. C in this figure represents a stationary covering of pneend of the pit, against which the section,-B, is situated when withdrawn. The axle around which the chain is wound, in withdrawing the bottom, is seen at D.

Figure 3 represents the windl'ass or wheel E E. V

Figure 4: represents the stationary covering C, which is omitted to be represented at the left hand of figs. 1 and 2 in the drawing.

The advantages of my improvement in the bottom of cupola-furnaces are many.

In the ordinary furnace, the bottom ofthe furnace is attached-to the shell by means ot' hinges, and is held in position, to sustain'the contents of the cupola, by means of ashore or prop standing underneath the same, and thc chamber is 'emptied of the residuum of the blast by removing `the prop, and allowing the bottom to swingdown, falling into the midst of the melted cinders or residuum, by reason of which it becomesV heated, burned, and warped, soon destroying it,'or rendering .it unfit for use, and rendering repair or renewal necessary, with great delay, expense, and damage. i

Beside, this method of discharging the contents of the cupola into the pit causes the heated air, gases, and smokc'to iill the building in which the cupola is situated, and renders'I it dillicult or impossible to remove the heated cinders, lite., or to close again the bottom ofthe chamber of the lcupola, until by radiation the cinders are cooled oi`,.occupying many hours.

By means of my improvement all these difficulties are ebviated.

Instead of dropping down the bottom of the cupola among the heated cinders, I withdrawvt to one side, and it serves as a cover\to the pit, preventing the smokc, gases, &c., from escaping into tbe building, and the chamber of the cupola thereby becomes a chimney to the pit, through which the smoke, gases, Ste., escape into the outer air.

In the ordinary cupola-furnace, the bottom, B, is made of iron only, andthe melted contents ofthe cupola sometimes work down through the sand in the bottom of the chamber, and melt out or cut away the bottom of the cupola. .I obviate this difficulty by inlayingr so much of thebottom as may be thus exposed to danger, with some non-fusible substance, as fire-clay or its equivalent.. This is represented in fig. 1 by A A.

The opera-tion ofmy improvement is as follows: When I wish to charge the cupola, thc bottom sections are brought into place, and by means of the cam-levers b I1, they ae-prossed rmly against the bottom shell of the cupolafbrliugingthe'bcaiu-leiers into a. perpendicular position, to ac t as props to keep the bottom in place. When it is desirable to discharge thel cupola from cinders, Svc., the cam-leversA are drawn aside to let the bottom, B, fall away, as'sljown in the left section of g. 1, in the drawing attached, thus' re'nderingiit easy Ito withdraw the section by means of the wheel, axle, and chain, as above set forth.

This being done, the sections of the bottom are withdrawn, and the contents of the cupola fall into the covered pit P P, and the chamber of the cupola becomes the chimney of the pit.

The pit is constructedpihn the formot" a section of an inverted pyramid, to prevent thccompactiug of-thc einders, Snc., therein. There may beA other outlets to this pit, through which the smoke, gases,l Sie, may be conducted away, while the bottom of the chamber of the cupola is closed for the purpose of recharging the cupola.

Hayipg thus fully described the nature of my said improvement, I will proceed to set forth my claims.

1. I claim the use of a. sliding-bottom to a cupola-t`urnace, constructed substantially in the manner and forthe purpose abovedescribed.

2. I claim the inlaying of such bottom with some non-fusible substance, substantially in the manner amb for the purpose above described, in combination'with the chamber of a cupolat`urnaee- 3. I claim the cam-levers b b, in combination with the bottom, B B, substanti'ally'in the manner and for 'the purpose above described.

4. I claimI the form of the pit, in combination with la cupola-furnace, constructed substantially in the manner 4and for the purpose above described. y

5. I claimthe bottom, B B, the wheel and axle D and E, the chain y "j, the truck-wheels a a a a, the camlever b, the guides R, in combination with the cupola of a melting-furnace, substantially in the manner and for-the purpose above described.

NORMAN BURDICK.

Witnesses Y ISAAC Fortuny, FRANK LEONARD.- 

